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Push resolver further up

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This commit is contained in:
Aleksey Kladov 2020-01-14 14:20:33 +01:00
parent 7ec62ea5e6
commit 21c5fd8b1b
4 changed files with 60 additions and 27 deletions
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41
crates/ra_hir_ty/src/method_resolution.rs
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@ -6,8 +6,8 @@ use std::sync::Arc;
use arrayvec::ArrayVec;
use hir_def::{
lang_item::LangItemTarget, resolver::Resolver, type_ref::Mutability, AssocContainerId,
AssocItemId, FunctionId, HasModule, ImplId, Lookup, TraitId,
lang_item::LangItemTarget, type_ref::Mutability, AssocContainerId, AssocItemId, FunctionId,
HasModule, ImplId, Lookup, TraitId,
};
use hir_expand::name::Name;
use ra_db::CrateId;
@ -144,14 +144,24 @@ impl Ty {
pub(crate) fn lookup_method(
ty: &Canonical<Ty>,
db: &impl HirDatabase,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: &Name,
resolver: &Resolver,
) -> Option<(Ty, FunctionId)> {
iterate_method_candidates(ty, db, resolver, Some(name), LookupMode::MethodCall, |ty, f| match f
{
AssocItemId::FunctionId(f) => Some((ty.clone(), f)),
_ => None,
})
iterate_method_candidates(
ty,
db,
env,
krate,
&traits_in_scope,
Some(name),
LookupMode::MethodCall,
|ty, f| match f {
AssocItemId::FunctionId(f) => Some((ty.clone(), f)),
_ => None,
},
)
}
/// Whether we're looking up a dotted method call (like `v.len()`) or a path
@ -172,14 +182,13 @@ pub enum LookupMode {
pub fn iterate_method_candidates<T>(
ty: &Canonical<Ty>,
db: &impl HirDatabase,
resolver: &Resolver,
env: Arc<TraitEnvironment>,
krate: CrateId,
traits_in_scope: &FxHashSet<TraitId>,
name: Option<&Name>,
mode: LookupMode,
mut callback: impl FnMut(&Ty, AssocItemId) -> Option<T>,
) -> Option<T> {
let traits_in_scope = resolver.traits_in_scope(db);
let krate = resolver.krate()?;
let env = TraitEnvironment::lower(db, resolver);
match mode {
LookupMode::MethodCall => {
// For method calls, rust first does any number of autoderef, and then one
@ -190,9 +199,7 @@ pub fn iterate_method_candidates<T>(
// Also note that when we've got a receiver like &S, even if the method we
// find in the end takes &self, we still do the autoderef step (just as
// rustc does an autoderef and then autoref again).
let environment = TraitEnvironment::lower(db, resolver);
let ty = InEnvironment { value: ty.clone(), environment };
let krate = resolver.krate()?;
let ty = InEnvironment { value: ty.clone(), environment: env.clone() };
// We have to be careful about the order we're looking at candidates
// in here. Consider the case where we're resolving `x.clone()`
@ -214,7 +221,7 @@ pub fn iterate_method_candidates<T>(
db,
env.clone(),
krate,
&traits_in_scope,
traits_in_scope,
name,
&mut callback,
) {
@ -230,7 +237,7 @@ pub fn iterate_method_candidates<T>(
db,
env,
krate,
&traits_in_scope,
traits_in_scope,
name,
&mut callback,
)